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Single Child

Intent​

Validate that a Screen with one child produces a box for both the Screen and the child, positioned at the origin with correct dimensions.

What is being tested​

  • A Card child is placed at (0, 0) inside the Screen
  • The Card's explicit width and height are stored exactly
  • The renderer produces two draw calls: Screen bg + Card rect

Acceptance criteria​

✓ No errors ✓ Status bar shows "2 boxes" ✓ One Card rectangle visible at the top-left of the canvas ✓ Card dimensions match 300 × 200 px ✓ Cursor on "Card" line highlights the Card box

Example​

Open in playground →

Screen {
  width: 800
  height: 600

  Card {
    width: 300
    height: 200
  }
}

Preview​

ut-f1-02-single-child